添加锰离子对秸秆还田土壤释放甲烷气体的影响  

Effect of manganese ion addition on methane emissionfrom straw-returned soil

作　　者：周海俊 陶嘉楠 袁龙威 龙海钰 程翰 梁梦娣 刘正伟 李相前 贺帅 刘培 ZHOU Haijun;TAO Jianan;YUAN Longwei;LONG Haiyu;CHENG Han;LIANG Mengdi;LIU Zhengwei;LI Xiangqian;HE Shuai;LIU Pei(School of Life Sciences and Food Engineering,Huaiyin Institute of Technology,Huaian 223003;Jiangsu Province Engineering Laboratory for Biomass Conversion and Process Integration,Huaian 223003)

机构地区：[1]淮阴工学院生命科学与食品工程学院,江苏淮安223003 [2]江苏省益生制剂重点建设实验室,江苏淮安223003

出　　处：《工业微生物》2022年第6期16-20,共5页Industrial Microbiology

基　　金：2021年淮阴工学院研究生科技创新计划项目(HGYK202105);江苏省高等学校大学生创新创业训练计划项目(202211049432YJ)。

摘　　要：针对我国每年近2亿吨二氧化碳当量的水稻田甲烷排放现状,研究不同锰盐浓度对模拟水稻秸秆还田后沼气减排效果的影响。本研究以模拟水稻田土壤混合秸秆环境为研究对象,调控不同的初始锰离子浓度,研究厌氧发酵过程中累计沼气和甲烷排放量。研究发现,初始锰盐质量浓度范围为1.75 mg/g~7.00 mg/g秸秆时,累计沼气排放量比无锰试验组降低4.36%~8.67%,特别是温室效应显著的甲烷排放量比无锰试验组降低了2.38%~5.34%。研究结果表明,调控模拟水稻田土壤混合秸秆中初始锰盐浓度,能显著降低稻田中温室气体的排放量,特别是有效降低甲烷的排放量。该研究成果,对于实现我国大面积水稻田温室气体减排和碳中和碳达峰战略目标,有一定的理论意义和实用价值。Aiming at the current situation of methane emission from paddy fields with nearly 200 million tons of carbon dioxide equivalent per year in China,the effect of different manganese salt concentrations on biogas emission reduction after simulated returning rice straw to field was investigated.In this study,the cumulative biogas and methane emissions during anaerobic fermentation were investigated by simulating the soil mixed with straw in rice fields and regulating different initial manganese ion concentrations.It was found that when the initial manganese salt mass concentration ranged from 0.49 mg/g to 1.94 mg/g straw,the cumulative biogas emissions were 4.36%~8.67%lower than that of the manganese free test group,especially the methane emissions with significant greenhouse effect were reduced by 2.38%~5.34%compared to that of the manganese free test group.The results showed that regulating the initial manganese concentration in simulated paddy field soil mixed with straw could significantly reduce the greenhouse gas emissions in paddy fields,especially effective in reducing methane emissions.The research results had certain theoretical significance and practical value for achieving the strategic goal of greenhouse gas emission reduction and carbon neutral carbon peak in large area of paddy fields in China.

关 键 词：稻田秸秆 沼气减排 锰盐浓度 

分 类 号：S153.6[农业科学—土壤学]